A high voltage gain current fed non-isolated dc-dc converter

In this paper, a non-isolated current fed boost dc-dc converter with coupled inductors is proposed. This converter achieves a high voltage gain ratio with zero-ripple input current. An active snubber circuit is employed to reduce the voltage spike of main switch generated by leakage inductance and realize zero voltage switching at turn-on. The circuit configuration, operation principle and design considerations of the proposed converter are presented. Experimental results for a 300 W hardware prototype with an input voltage range of 40-50 V and regulated output voltage of 400 V are obtained for validation of the proposed converter topology.